Heatsink Overheat

What does OH mean?

The OH condition indicates that the inverter's heatsink temperature has risen above the set OH Pre-Alarm Level (L8-02). This is a warning that the inverter is approaching an over-temperature condition. If the temperature continues to rise, the inverter will likely trip to protect its internal power components.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Check for adequate ventilation around the inverter enclosure; remove any blockages to airflow.

2. 4

   Clean the heatsink fins and internal cooling passages thoroughly.

3. 5

   Review and potentially adjust the OH Pre-Alarm Level (L8-02) if it is set too low for the application's normal operating conditions, while maintaining proper protection.